Improvement in patterns for casting printing-disks



Jor-N GoLDsBoRouG yP'fnterns for Casting Prin'tirg-Dlsks.

N0. 124,350. Patented March 5,872.

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wnNEssm////Q i A UNI-Irun IS'IAfrns PATENT OFFICE.,

.IoIIN eoLDsBonoUeH, or PHILADELPHIA, PENNSYLVANIA.

liVlPlOi/EiiliENT IN lPAflm'iEliNS FOR CASTING PRINTING-DISKS.'

' Specification forming part of Letters Patent No. 124,350, dated March 5, 1872.

Specification describing an Improved Iat-l tern for Printing Disks, &c., invented by JOHN G OLDSBOROUGH, of Philadelphia, Pennsylvania.

I mpi'o veel Pattern for Molding Printing- Disks, tto.

an edge view of a pattern for molding printing disks constructed in accordance with my invention, Fig. 2, a sectional view of the same and of the mold 5 Fig. 3, a face view of the pattern with the upper plate removed, Fig. 4, the same as Fig. 3, with the central portion removed and the outer sections drawn in so as to contract the diameter of the pattern and enable thelatter to be drawn or lifted from the mold; and Fig. 5, a view representing the lower plate and two of the sections of the pattern detached from each other.

The pattern shown in the drawing is for one of the numbering or dating disks of a handstampingmachine, upon the periphery of which the dates are to be formed in raised figures.

It will be evident that an ordinary solid pattern having raised letters or figures upon its periphery corresponding to those of the printing-disk could not be drawn from the mold without destroying the latter 5 but by constructing the pattern as I will now proceed to describe, so that it can be contracted in diameter while in the mold, this difficulty is overcome.

The pattern is of a sectional structure; and consists mainly of upper and lower plates A and B, a central circular block, D, confined between the said plates, and a number of radial sections, E and F, confined between the said plates and circular block, and having letters or ligures in relief formed upon their curved outer edges, which, united, form the periphery of the pattern. The sections E, of which there are four in the present instance, have upon their under sides ribs a adapted to corresponding radial grooves b formed in the plate B, these grooves serving as guides for the sections in their movements from and toward the center of the pattern, and determining the eX- tent of the outward movement of the said sections. (See Fig. 5.) The inner curved edges of the sections E bear against the periphery of the circular block D, which thus retains the said sections in the position to which they are adjusted outward, as shown in Figs. 2 and 3. The sections F are of a triangular shape, and are adapted to the spaces between the sections E. On the upper faces of the sections E and F are deep curved recesses c, which, when the said sections are adjusted outward to their full extent, form together a continuous circular groove (Fig. 3) adapted for the reception of a correspondingcircular rib, d, on the under side of the plate A, the latter thus serving to lock and hold armiy the whole of the sections. The l sections of the pattern are secured together so as to enable the whole to be handled, without falling to pieces, by a rod, H, (Fig. 2,) the lower threaded end of which is screwed into threaded openings e formed in the plates A and B and block D. This rod, besides serving as a convenient handle for the pattern, forms the gate in the mold, as will be understood on referring to Fig. 2.

In order to draw the pattern the upper section of the mold is first removed, as usual, after which the plate A is lifted from the pattern by means of the screw-rod, leaving the sections exposed, as shown in Fig. 3. The block D, which is made slightly tapering toward its lower edge, is then also removed by means of the screw-rod, and the sections E are then slid inward upon the radial grooves b until they are brought in contact with each other, as shown in Fig. 4, after which the sections F are also slid inward to the full extent permitted by the sections E. This will sufflciently contract the pattern in diameter to enable the whole to be lifted or drawn from the mold by means of the screw-rod inserted into the threaded hole c of the under plate B.

Patterns constructed substantially as above described can be used in molding printingwheels for numbering presses or other circular or cylindrical objects having letters or characters in relief upon their curved edges or surfaces, as well as for the prntmgdisks of handstamping machines.

I claim as my inventionl. A circular or cylindrical pattern7 coinposed of a number of adjustable sections having characters at their outer periph ery capable of radial adjustment, and confined between plates, substantially as herein described.

2. The combination, with the adjustable sections of an annular rib, d, on one of the covering-plates, adapted to grooves formed in the said sections, all substantially as described.

In testimony whereof I have signed my name to vthis specification in the presence of two subscribing witnesses.

JOHN GOLDSBOROUGH.

Witnesses:

WM. A. STEEL, HARRY SMITH. 

